﻿/*
* Copyright (c) 2010-2012 Tesla Engine Group
* 
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/

using Tesla.Graphics;

namespace Tesla.Content.Loaders {
    /// <summary>
    /// Resource loader for multi-material TEM files. 
    /// </summary>
    public sealed class MaterialCollectionLoader : ResourceLoader<MaterialCollection> {
        private MaterialParser _parser;

        /// <summary>
        /// Initializes a new instance of the <see cref="MaterialCollectionLoader"/> class.
        /// </summary>
        public MaterialCollectionLoader() : base(".tem") {}

        /// <summary>
        /// Called when the loader is initialized, usually when it's added to a content manager.
        /// </summary>
        protected override void OnInitialize() {
            _parser = new MaterialParser(ContentManager);
        }

        /// <summary>
        /// Loads the specified resource.
        /// </summary>
        /// <param name="resource">The resource to load.</param>
        /// <param name="parameters">Loader parameters.</param>
        /// <returns>The loaded MaterialCollection</returns>
        public override MaterialCollection Load(IResource resource, LoaderParameters parameters) {
            if(_parser == null) {
                _parser = new MaterialParser(ContentManager);
            }

            return _parser.LoadAllMaterials(resource, parameters);
        }
    }
}
